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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Oswego County Lake Quality

New York, 25 lakes, measured by NY DEC

The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The 25 monitored lakes in Oswego County carry whatever clarity, phosphorus, and chlorophyll-a readings NY DEC has published, shown as reported.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.

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Where to stay near Oswego County

Top-rated places to stay near Oswego County

Prices for Oct 23–25, 4 adults. Change dates on the map below.

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Quick Answers for Oswego County

Cleanest lakes in Oswego County →Cleanest lakes in New York →Best swimming lakes in New York →

Planning a trip? Check special fishing regulations for Panther Lake — or check the official New York fishing regulations.

All Lakes in Oswego County

25 lakes · 0 ranked on readings, 25 without enough sampling0 lakes ranked on readings · 25 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
Panther LakeOswego7.4 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Kasoag LakeOswego8.1 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Sage PondOswego5.4 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pleasant LakeOswego4.4 ftNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
South PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples25 ftNot recorded
North PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples13 ftNot recorded
Whitney PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Long PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Coan PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mosher PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Chase PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
South PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
North PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Carterville PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples4.9 ftNot recorded
Cody PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Francis PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples8.9 ftNot recorded
Dutcher PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Vanderkamp LakeOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples21.7 ftNot recorded
Oneida LakeOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samples55.1 ft✓ Public
Lake NeatahwantaOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Russ PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mud PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Crooks PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
McMullen PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mud PondOswegoNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Other Counties in New York

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4 lakes

Hamilton County

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110 lakes

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129 lakes

Lewis County

33 lakes

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Browse every New York lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the New York Department of Environmental Conservation. See data sources.